Hook forming apparatus for rods and wire



Dec. 26, 1950 T. s. SOMERVILLE 2,535,328

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HOOK FORMING APPARATUS FOR RODS AND WIRE Filed Aug. 23, 1949 3Sheets-Sheet 3 Patented Dee. 1950 HOOK FORMING APPARATUS FOR RODS ANDSomerville, Monongahela, Pa" as- Thomas S.

WIR

signer to The American Steel and Wire Company of New Jersey, acorporation of New Jersey Application August 23, 1949, Serial No.111,875

Claims.

This invention relates to a hook forming machine and more particularlyto a machine for forming hooks on the ends of stay wires in a wirefabric. Various types of apparatus have been devised for forming hookson rods, but they are not entirely satisfactory from the standpoint offorming an accurate hook rapidly and cheaply. This is especially truewhen forming the hooks on the ends of stay wires in a wire fabric.

It is therefore an object of my invention to provide a hook formingmachine which can rapidly and accurately form hooks on the ends of rodsof wires, especially on the ends of stay wires in a wire fabric.

This and other objects will be more apparent after referring to thefollowing specification and attached drawings, in which:

Figure 1 is a plan view partly in section taken slightly above the axisof rotation of the machine of my invention;

Figure 2 is a sectional view taken on the line II-II of Figure 1;

Figure 3 is a view similar to Figure 2 but showing the position of theparts after a hook has been formed on the end of a stay wire;

Figure 4 is a sectional view taken on the line IV--IV of Figure 2; and

Figure 5 is an elevation of the housing cap.

Referring more particularly to the drawings the reference numeral 2indicates a base or supporting beam of the hook forming machine. Abracket 4 is fastened to the base 2 by means of bolts 0. A member 8 isfastened to the bracket 4 bymeans of cap screws i0 and I2 and has a rackslide groove ll therein. Slidably received in the groove II is a slidei4 having a rack l6 thereon. Attached to the base 2 by means of bolts2|] is a housing 22 having a bearing 24 therein. A housing cap 28 isfastened to the housing 22 by means of cap screws 28. As best shown inFigures 4 and 5, the cap 26 has a bell mouthed slot 30 therein andholding anvil l2 and a hook mandrel 34 made of hardened tool steelfastened thereto in any suitable manner. The illustrated manner offastening anvil 32 and mandrel 34 to cap plate 2! is by anintegralthreaded lug on a shouldered portion of said anvil and mandrel,the threaded end of each lug extending outwardly through suitableopenings in said cap plate 26, for receiving a nut which is screwed intocontact with the outer face of the can plate. Mounted for rotation inthe bearing 24 is a cylinder 38 having an axial slot 8| therein. A gear40 in mesh with the rack it is attached to the cylinder 38 by means ofcap screws 42 and keys 44. A slot 4| in line with slot 30 is provided inthe gear 40.

The cylinder 38 is provided with a radial slot 48 having 8. lug 50 onone side thereof. A forming roller 52 is mounted in the slot 48 on abolt 64 which is threaded into the cylinder 36 through the lug Iii. Acompression spring 58 is provided on each side of the roller 52 to holdit in centered position on the bolt 54. A slot I8 is provided about halfway around the periphery of cylinder 36 opposite the slot 48. The rackit is reciprocated by means of an air cylinder 80 having its piston rod62 attached thereto.

\ The operation of the device is as follows:

The workpiece is a wire fabric F having stay wires FS which areconnected by means of strand wires FL. The fabric F is moved through themachine until a. wire FS reaches the center line of the roller I2 asshown in Figures 1 and 4. Air is then admitted to the air cylinder 80 tomove the rack l6 and rotate the gear 40 and cylinder 86 in acounterclockwise direction to the position shown in Figure 3, thusforming a hook on the end of the wire. Air is then admitted to theopposite end of air cylinder to bring the gear 40 and cylinder 36 backto their original position. The fabric F is then moved to strip theformed hook from mandrel 34 and to bring another wire FS into positionfor bending.

While one embodiment of my invention has been shown and described itwill be apparent that other adaptations and modifications may be madewithout departing from the scope of the following claims.

I claim:

1. Apparatus for forming hooks on the ends of rods comprising a housing,a housing cap attached to said housing, a cylinder rotatably mounted insaid housing, means for rotating said cylinder, a hook mandrel fastenedto said cap and extending inside said cylinder, a holding mandrelfastened to said cap and extending inside said cylinder, said mandrelsbeing spaced apart to permit insertion of said rod therebetween, and aroller mounted in said cylinder for movement therewith, the axis of saidroller being parallel to the cylinder axis, said roller being, adaptedto contact the end of the rod and bend it around the hook mandrel whenthe cylinder is rotated.

2. Apparatus for forming hooks on the ends of rods comprising a housing,a housing cap attached to said housing, a cylinder rotatably mounted insaid housing, means for rotating said cylinder, said housing, cap, andcylinder having slots therein extending the length thereof from thecenter to one side thereof, a hook mandrel fastened to said cap andextending inside said cylinder, a holding mandrel fastened to said capand extending inside said cylinder, said mandrels being spaced apart topermit insertion of said rod therebetween, and a roller mounted in saidcylinder for movement therewith, the axis of said roller being parallelto the cylinder axis, said roller being adapted to contact the end ofthe rod and bend it around the hook mandrel when the cylinder isrotated.

3. Apparatus for forming hooks on the ends of rods comprising a base, arack slidably mounted on said base, a housing mounted on said base, ahousing cap attached to said housing, a cylinder rotatably mounted insaid housing, a gear attached to said cylinder, said gear bein in meshwith said rack, a hook mandrel fastened to said cap and extending insidesaid cylinder, a holding mandrel fastened to said cap and extendinginside said cylinder, said mandrels being spaced apart to permitinsertion of said rod therebetween, and a roller mounted in saidcylinder for movement therewith, the axis of said roller being parallelto the cylinder axis, said roller being adapted to contact the end ofthe rod and bend it around the hook mandrel when the cylinder isrotated.

4. Apparatus for forming hookson the ends of rods comprising a base, arack slidably mounted on said base, a housing mounted on said base, ahousing cap attached to said housing, a cylinder rotatably mounted insaid housing, a gear attached to said cylinder, said gear being in meshwith said rack, said housing, cap, cylinder and gear having slotstherein extendin the length thereof from the center to one side thereof,a

hook mandrel fastened to said cap and extending inside said cylinder, aholding mandrel fastened to said cap and extending inside said cylinder.said mandrels being spaced apart to permit insertion of said rodtherebetween, and a roller mounted in said cylinder for movementtherewith, the axis of said roller being parallel to the cylinder axis,said roller being adapted to contact the end of the rod and bend itaround the hook mandrel when the cylinder is rotated.

5. Apparatus for forming hooks on the ends of rods according to claim 4in which the cylinder has a radial opening therein for receiving theroller, a bolt for supporting said roller extending through saidopening, and a spring surrounding said bolt on each side of the rollerand bearing against the roller and the cylinder to keep the roller incentered position.

'. THOMAS 8. SOMERVIILE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 106,188 Morris Aug. 9, 1870413,666 Hill Oct. 29, 1889 518,426 Randall Apr. 17, 1894 633,213 PerrySept. 19, 1899 844,206 Sommer Feb. 12, 1907 954,205 Randall Apr. 5, 19101,050,348 Cronander Jan. 14, 1913 2,108,917 Elder Feb. 22, 19382,128,620 Lyons Aug. 30, 1938 2,362,522 Anderson Nov. 14, 1944

